How to write 'pure functions' and why to do it at all?

The article on "Clean Code" outlines 7 practical tips that can help programmers enhance the quality of the code they write. The first tip highlights the importance of readability – well-written code should be easy for others to understand. The second piece of advice emphasizes the significance of meaningful names; variables, functions, and classes should have clear and descriptive names, aiding comprehension. The next tip addresses avoiding code duplication, which can be achieved by adhering to the appropriate DRY (Don't Repeat Yourself) principles. The fourth principle states that code should be short and concise – each function should perform one task and should be brief enough. Following this, the author recommends regularly refactoring code to improve its structure and eliminate any unnecessary elements. The sixth principle concerns code testing, which is a crucial element in ensuring quality. Finally, the last advice is to use comments wisely; they can be helpful, but should be used sparingly and only when the code isn't self-explanatory. By applying these tips, the code we write can be clean, easy to understand, and maintain, which will undoubtedly yield long-term benefits.